Publishing into Google spreadsheets does nothing


I'm using ODK Collect 1.4 and ODK Aggregate 1.4 (in GAE) to publish forms
from an Android device into Google spreadsheets.
Everything seems to work properly. The form is properly submitted from the
Android device and then the submission can be seen from the Aggregate UI
web interface (on Submission section).
However, the spreadsheet is not published, always in "NOT YET CREATED"

From an authentication perspective, I tried the following:

  • To publish through a Google Apps account, using OAuth2 and following the
  • To publish through my gmail account.

Same result on both, the spreadsheet is not published, and no errors or
warnings of any type is shown on the Aggregate UI web interface.
Any guidance would be appreciated. BTW, I had the same issue with the
previous version 1.3.4, so latest update should not affect.